Most relevant results when doing a Site: search on Google?

[myvoice]

"In order to show you the most relevant results, we have omitted some entries very similar to the 7 already displayed.
If you like, you can repeat the search with the omitted results included."

This is what I ve seen when I did a site: search on Google for one site. Why does Google think the rest of pages are similar to the displayed ones when the title, content are unique for every page and none of the pages are supplemental either.

[Quadrille]

Are the pages dynamic?

Do they have lots of unique content?

Is there a ton of shared code on each page, dwarfing the uniquity?

Does every page have a unique title and meta description?

Did you know that site:search is utterly useless anyway? :)

[myvoice]

Are the pages dynamic?
No, Static

Do they have lots of unique content?
Yes

Is there a ton of shared code on each page, dwarfing the uniquity?
No

Does every page have a unique title and meta description?
Yes

Did you know that site:search is utterly useless anyway?
do u mean to say site:search is useless on Google?